org.apache.solr.search

Class QueryParsing

java.lang.Object

org.apache.solr.search.QueryParsing

public class QueryParsing
extends Object

Collection of static utilities useful for query parsing.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	QueryParsing.StrParser Simple class to help with parsing a string.

Field Summary

Fields

Modifier and Type	Field and Description
static String	DEFTYPE
static String	DOCID
static String	F
static char	LOCALPARAM_END
static String	LOCALPARAM_START
static String	OP
static String	SCORE
static String	TYPE
static String	V
static String	VAL_EXPLICIT

Constructor Summary

Constructors

Constructor and Description
QueryParsing()

Method Summary

Methods

Modifier and Type	Method and Description
static String	encodeLocalParamVal(String val)
static String	getDefaultField(IndexSchema s, String df) Returns the effective default field based on the 'df' param or hardcoded schema default.
static SolrParams	getLocalParams(String txt, SolrParams params) "foo" returns null "{!prefix f=myfield}yes" returns type="prefix",f="myfield",v="yes" "{!prefix f=myfield v=$p}" returns type="prefix",f="myfield",v=params.get("p")
static QueryParser.Operator	getQueryParserDefaultOperator(IndexSchema sch, String override) Returns the "preferred" default operator for use by Query Parsers, based on the settings in the IndexSchema which may be overridden using an optional String override value.
static int	parseLocalParams(String txt, int start, Map<String,String> target, SolrParams params)
static int	parseLocalParams(String txt, int start, Map<String,String> target, SolrParams params, String startString, char endChar)
static SortSpec	parseSortSpec(String sortSpec, SolrQueryRequest req) The form of the sort specification string currently parsed is:
static List<String>	toString(List<Query> queries, IndexSchema schema) Builds a list of String which are stringified versions of a list of Queries
static String	toString(Query query, IndexSchema schema) Formats a Query for debugging, using the IndexSchema to make complex field types readable.
static void	toString(Query query, IndexSchema schema, Appendable out, int flags)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

OP

public static final String OP

See Also:

Constant Field Values

V

public static final String V

See Also:

Constant Field Values

F

public static final String F

See Also:

Constant Field Values

TYPE

public static final String TYPE

See Also:

Constant Field Values

DEFTYPE

public static final String DEFTYPE

See Also:

Constant Field Values

LOCALPARAM_START

public static final String LOCALPARAM_START

See Also:

Constant Field Values

LOCALPARAM_END

public static final char LOCALPARAM_END

See Also:

Constant Field Values

DOCID

public static final String DOCID

See Also:

Constant Field Values

SCORE

public static final String SCORE

See Also:

Constant Field Values

VAL_EXPLICIT

public static final String VAL_EXPLICIT

See Also:

Constant Field Values

Constructor Detail

QueryParsing

public QueryParsing()

Method Detail

getQueryParserDefaultOperator

public static QueryParser.Operator getQueryParserDefaultOperator(IndexSchema sch,
                                                 String override)

Returns the "preferred" default operator for use by Query Parsers, based on the settings in the IndexSchema which may be overridden using an optional String override value.

See Also:

IndexSchema.getQueryParserDefaultOperator(), OP

getDefaultField

public static String getDefaultField(IndexSchema s,
                     String df)

Returns the effective default field based on the 'df' param or hardcoded schema default. May be null if either exists specified.

See Also:

CommonParams.DF, IndexSchema.getDefaultSearchFieldName()

parseLocalParams

public static int parseLocalParams(String txt,
                   int start,
                   Map<String,String> target,
                   SolrParams params)
                            throws SyntaxError

Throws:

SyntaxError

parseLocalParams

public static int parseLocalParams(String txt,
                   int start,
                   Map<String,String> target,
                   SolrParams params,
                   String startString,
                   char endChar)
                            throws SyntaxError

Throws:

SyntaxError

encodeLocalParamVal

public static String encodeLocalParamVal(String val)

getLocalParams

public static SolrParams getLocalParams(String txt,
                        SolrParams params)
                                 throws SyntaxError

"foo" returns null "{!prefix f=myfield}yes" returns type="prefix",f="myfield",v="yes" "{!prefix f=myfield v=$p}" returns type="prefix",f="myfield",v=params.get("p")

Throws:

SyntaxError

parseSortSpec

public static SortSpec parseSortSpec(String sortSpec,
                     SolrQueryRequest req)

The form of the sort specification string currently parsed is:

 SortSpec ::= SingleSort [, SingleSort]*
 SingleSort ::= <fieldname|function> SortDirection
 SortDirection ::= top | desc | bottom | asc
 

Examples:

   score desc               #normal sort by score (will return null)
   weight bottom            #sort by weight ascending
   weight desc              #sort by weight descending
   height desc,weight desc  #sort by height descending, and use weight descending to break any ties
   height desc,weight asc   #sort by height descending, using weight ascending as a tiebreaker
 

Returns:

a SortSpec object populated with the appropriate Sort (which may be null if default score sort is used) and SchemaFields (where applicable) using hardcoded default count & offset values.

toString

public static void toString(Query query,
            IndexSchema schema,
            Appendable out,
            int flags)
                     throws IOException

Throws:

IOException

See Also:

toString(Query,IndexSchema)

toString

public static String toString(Query query,
              IndexSchema schema)

Formats a Query for debugging, using the IndexSchema to make complex field types readable.

The benefit of using this method instead of calling Query.toString directly is that it knows about the data types of each field, so any field which is encoded in a particularly complex way is still readable. The downside is that it only knows about built in Query types, and will not be able to format custom Query classes.

toString

public static List<String> toString(List<Query> queries,
                    IndexSchema schema)

Builds a list of String which are stringified versions of a list of Queries